mntws

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Marvelous Mountains Data Collection Worksheet

Count the number of teeth on each gear and record it on the chart. Then determine the teeth ratio and decimal equivalent for each combination.

Largest Gear = A Total Number of Teeth on Gear A = _______

Smallest Gear = B Total Number of Teeth on Gear B = _______

Wheel Gears	Gears Connected	Teeth Ratio	Decimal Equivalent	Gears Connected	Teeth Ratio	Decimal Equivqlent
*Smallest* Gear 1 Teeth = _______	A / 1	.	.	B / 1	.	.
Gear 2 Teeth = _______	A / 2	.	.	B / 2	.	.
Gear 3 Teeth = _______	A / 3	.	.	B / 3	.	.
Gear 4 Teeth = _______	A / 4	.	.	B / 4	.	.
*Largest* Gear 5 Teeth = _______	A / 5	.	.	B / 5	.	.

Turn the bicycle upside down. Cut out the protractor and mount it to the rear wheel of the bike. Set the gears at each combination. Turn the rear wheel so that the 0 degree position is at a bar of the frame. Apply friction to the rear wheel while you turn the pedal one 360 degree rotation. Record how many degrees of turning are made by the wheel. Remember that one complete rotation is 360 degrees. Record the results and determine the number of turns in decimal notation by dividing the degrees of turn by 360 degrees per turn.

Largest Pedal Gear = A Small Pedal Gear = B

Wheel Gears	Gears Connected	Degrees of Turn	Decimal Equivalent	Gears Connected	Degrees of Turn	Decimal Equivalent
*Smallest* Gear 1	A / 1	.	.	B / 1	.	.
Gear 2	A / 2	.	.	B / 2	.	.
Gear 3	A / 3	.	.	B / 3	.	.
Gear 4	A / 4	.	.	B / 4	.	.
*Largest* Gear 5	A / 5	.	.	B / 5	.	.